24" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated + Product Details Size -

+ Product Details Size - 12"w X 10"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 25" OR 25" x 20" duct opening (measured at the opening)

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+ Product Details Size - 32"w X 24"h is the size for the duct opening measurement only

24" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 23. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum Made from